Datasheet
LT1228
3
1228fd
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. Current Feedback Amplifier, Pins 1, 6, 8. ±5V ≤ V
S
≤ ±15V, I
SET
= 0µA,
V
CM
= 0V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
R
IN
Input Resistance V
IN
= ±13V, V
S
= ±15V
V
IN
= ±3V, V
S
= ±5V
l
l
2
2
25
25
MΩ
MΩ
C
IN
Input Capacitance (Note 3) V
S
= ±5V 6 pF
Input Voltage Range V
S
= ±15V, T
A
= 25°C
l
±13
±12
±13.5 V
V
V
S
= ±5V, T
A
= 25°C
l
±3
±2
±3.5 V
V
CMRR Common Mode Rejection Ratio V
S
= ±15V, V
CM
= ±13V, T
A
= 25°C
V
S
= ±15V, V
CM
= ±12V
V
S
= ±5V, V
CM
= ±3V, T
A
= 25°C
V
S
= ±5V, V
CM
= ±2V
l
l
55
55
55
55
69
69
dB
dB
dB
dB
Inverting Input Current Common
Mode Rejection
V
S
= ±15V, V
CM
= ±13V, T
A
= 25°C
V
S
= ±15V, V
CM
= ±12V
V
S
= ±5V, V
CM
= ±3V, T
A
= 25°C
V
S
= ±5V, V
CM
= ±2V
l
l
2.5
2.5
10
10
10
10
µA/V
µA/V
µ
A/V
µA/V
PSRR Power Supply Rejection Ratio V
S
= ±2V to ±15V, T
A
= 25°C
V
S
= ±3V to ±15V
l
60
60
80 dB
dB
Noninverting Input Current Power
Supply Rejection
V
S
= ±2V to ±15V, T
A
= 25°C
V
S
= ±3V to ±15V
l
10 50
50
nA/V
nA/V
Inverting Input Current Power Supply
Rejection
V
S
= ±2V to ±15V, T
A
= 25°C
V
S
= ±3V to ±15V
l
0.1 5
5
µA/V
µA/V
A
V
Large-Signal Voltage Gain V
S
= ±15V, V
OUT
= ±10V, R
LOAD
= 1k
V
S
= ±5V, V
OUT
= ±2V, R
LOAD
= 150Ω
l
l
55
55
65
65
dB
dB
R
OL
Transresistance, ∆V
OUT
/∆I
IN
–
V
S
= ±15V, V
OUT
= ±10V, R
LOAD
= 1k
V
S
= ±5V, V
OUT
= ±2V, R
LOAD
= 150Ω
l
l
100
100
200
200
kΩ
kΩ
V
OUT
Maximum Output Voltage Swing V
S
= ±15V, R
LOAD
= 400Ω, T
A
= 25°C
l
±12
±10
±13.5 V
V
V
S
= ±5V, R
LOAD
= 150Ω, T
A
= 25°C
l
±3
±2.5
±3.7 V
V
I
OUT
Maximum Output Current R
LOAD
= 0Ω, T
A
= 25°C
l
30
25
65 125
125
mA
mA
I
S
Supply Current V
OUT
= 0V, I
SET
= 0V
l
6 11 mA
SR Slew Rate (Notes 4 and 6) T
A
= 25°C 300 500 V/µs
SR Slew Rate V
S
= ±15V, R
F
= 750Ω, R
G
= 750Ω, R
L
= 400Ω 3500 V/µs
t
r
Rise Time (Notes 5 and 6) T
A
= 25°C 10 20 ns
BW Small-Signal Bandwidth V
S
= ±15V, R
F
= 750Ω, R
G
= 750Ω, R
L
= 100Ω 100 MHz
t
r
Small-Signal Rise Time V
S
= ±15V, R
F
= 750Ω, R
G
= 750Ω, R
L
= 100Ω 3.5 ns
Propagation Delay V
S
= ±15V, R
F
= 750Ω, R
G
= 750Ω, R
L
= 100Ω 3.5 ns
Small-Signal Overshoot V
S
= ±15V, R
F
= 750Ω, R
G
= 750Ω, R
L
= 100Ω 15 %
t
S
Settling Time 0.1%, V
OUT
= 10V, R
F
=1k, R
G
= 1k, R
L
=1k 45 ns
Differential Gain (Note 7) V
S
= ±15V, R
F
= 750Ω, R
G
= 750Ω, R
L
= 1k 0.01 %
Differential Phase (Note 7) V
S
= ±15V, R
F
= 750Ω, R
G
= 750Ω, R
L
= 1k 0.01 DEG
Differential Gain (Note 7) V
S
= ±15V, R
F
= 750Ω, R
G
= 750Ω, R
L
= 150Ω 0.04 %
Differential Phase (Note 7) V
S
= ±15V, R
F
= 750Ω, R
G
= 750Ω, R
L
= 150Ω 0.1 DEG